:root{--bg:#F3F4F7;--surface:#fff;--ink:#151A2D;--muted:#5B6278;--line:#D9DCE5;--accent:#2F43C8}
@media (prefers-color-scheme:dark){:root{--bg:#0F1220;--surface:#171B2C;--ink:#E8EAF3;--muted:#9AA1BA;--line:#2B3149;--accent:#8E9BFF;color-scheme:dark}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 "IBM Plex Sans","Segoe UI",system-ui,sans-serif}
.wrap{max-width:760px;margin:0 auto;padding:40px 20px 64px}
header{display:flex;align-items:center;gap:10px;font-weight:700;margin-bottom:36px}header i{width:12px;height:12px;border-radius:3px;background:var(--accent);display:inline-block}
header a{color:inherit;text-decoration:none}nav{margin-left:auto;font-weight:500;font-size:.92rem;display:flex;gap:16px}nav a{color:var(--muted)}
h1{font-size:2rem;line-height:1.15;margin:0 0 12px;text-wrap:balance}h2{font-size:1.15rem;margin:32px 0 8px}
p,li{color:var(--ink)}.lead{font-size:1.1rem;color:var(--muted)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:20px 22px;margin:24px 0}
a{color:var(--accent)}footer{margin-top:48px;padding-top:16px;border-top:1px solid var(--line);font-size:.85rem;color:var(--muted)}
ul{padding-left:20px}